﻿using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;

namespace VncRecorder
{
    //Copy From
    //http://www.codeproject.com/Tips/443588/Simple-Csharp-FTP-Class
    class Ftp
    {
        private string host = null;
        private string user = null;
        private string pass = null;
        private FtpWebRequest ftpRequest = null;
        private FtpWebResponse ftpResponse = null;
        private Stream ftpStream = null;
        private int bufferSize = 2048;

        /* Construct Object */
        public Ftp(string hostIP, string userName, string password) { host = hostIP; user = userName; pass = password; }

        /* Download File */
        public void download(string remoteFile, string localFile)
        {
            try
            {
                /* Create an FTP Request */
                ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + remoteFile);
                /* Log in to the FTP Server with the User Name and Password Provided */
                ftpRequest.Credentials = new NetworkCredential(user, pass);
                /* When in doubt, use these options */
                ftpRequest.UseBinary = true;
                ftpRequest.UsePassive = true;
                ftpRequest.KeepAlive = true;
                /* Specify the Type of FTP Request */
                ftpRequest.Method = WebRequestMethods.Ftp.DownloadFile;
                /* Establish Return Communication with the FTP Server */
                ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                /* Get the FTP Server's Response Stream */
                ftpStream = ftpResponse.GetResponseStream();
                /* Open a File Stream to Write the Downloaded File */
                FileStream localFileStream = new FileStream(localFile, FileMode.Create);
                /* Buffer for the Downloaded Data */
                byte[] byteBuffer = new byte[bufferSize];
                int bytesRead = ftpStream.Read(byteBuffer, 0, bufferSize);
                /* Download the File by Writing the Buffered Data Until the Transfer is Complete */
                try
                {
                    while (bytesRead > 0)
                    {
                        localFileStream.Write(byteBuffer, 0, bytesRead);
                        bytesRead = ftpStream.Read(byteBuffer, 0, bufferSize);
                    }
                }
                catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                /* Resource Cleanup */
                localFileStream.Close();
                ftpStream.Close();
                ftpResponse.Close();
                ftpRequest = null;
            }
            catch (Exception ex) { Console.WriteLine(ex.ToString()); }
            return;
        }

        /* Upload File */
        public string upload(string remoteFile, string localFile)
        {

            FtpWebRequest ftpClient = (FtpWebRequest)FtpWebRequest.Create(host + "/" + remoteFile);
            ftpClient.Credentials = new System.Net.NetworkCredential(user, pass);
            ftpClient.Method = System.Net.WebRequestMethods.Ftp.UploadFile;
            ftpClient.UseBinary = true;
            ftpClient.KeepAlive = true;
            System.IO.FileInfo fi = new System.IO.FileInfo(localFile);
            ftpClient.ContentLength = fi.Length;
            byte[] buffer = new byte[4097];
            int bytes = 0;
            int total_bytes = (int)fi.Length;
            System.IO.FileStream fs = fi.OpenRead();
            System.IO.Stream rs = ftpClient.GetRequestStream();
            while (total_bytes > 0)
            {
                bytes = fs.Read(buffer, 0, buffer.Length);
                rs.Write(buffer, 0, bytes);
                total_bytes = total_bytes - bytes;
            }
            //fs.Flush();
            fs.Close();
            rs.Close();

            FtpWebResponse uploadResponse = (FtpWebResponse)ftpClient.GetResponse();
            var value = uploadResponse.StatusDescription;
            uploadResponse.Close();
            ftpRequest = null;
            return value;

            //Not work for the large file upload case!
            // try
            //{
            //    /* Create an FTP Request */
            //    ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + remoteFile);
            //    /* Log in to the FTP Server with the User Name and Password Provided */
            //    ftpRequest.Credentials = new NetworkCredential(user, pass);
            //    /* When in doubt, use these options */
            //    ftpRequest.UseBinary = true;
            //    ftpRequest.UsePassive = true;
            //    ftpRequest.KeepAlive = true;
            //    /* Specify the Type of FTP Request */
            //    ftpRequest.Method = WebRequestMethods.Ftp.UploadFile;
            //    /* Establish Return Communication with the FTP Server */
            //    ftpStream = ftpRequest.GetRequestStream();
            //    /* Open a File Stream to Read the File for Upload */
            //    FileStream localFileStream = new FileStream(localFile, FileMode.Create);
            //    /* Buffer for the Downloaded Data */
            //    byte[] byteBuffer = new byte[bufferSize];
            //    int bytesSent = localFileStream.Read(byteBuffer, 0, bufferSize);
            //    /* Upload the File by Sending the Buffered Data Until the Transfer is Complete */
            //    try
            //    {
            //        while (bytesSent != 0)
            //        {
            //            ftpStream.Write(byteBuffer, 0, bytesSent);
            //            bytesSent = localFileStream.Read(byteBuffer, 0, bufferSize);
            //        }
            //    }
            //    catch (Exception ex) { Console.WriteLine(ex.ToString()); }
            //    /* Resource Cleanup */
            //    localFileStream.Close();
            //    ftpStream.Close();
            //    ftpRequest = null;
            //}
            //catch (Exception ex) { Console.WriteLine(ex.ToString()); }
            //return;
        }

        /* Delete File */
        public void delete(string deleteFile)
        {
            try
            {
                /* Create an FTP Request */
                ftpRequest = (FtpWebRequest)WebRequest.Create(host + "/" + deleteFile);
                /* Log in to the FTP Server with the User Name and Password Provided */
                ftpRequest.Credentials = new NetworkCredential(user, pass);
                /* When in doubt, use these options */
                ftpRequest.UseBinary = true;
                ftpRequest.UsePassive = true;
                ftpRequest.KeepAlive = true;
                /* Specify the Type of FTP Request */
                ftpRequest.Method = WebRequestMethods.Ftp.DeleteFile;
                /* Establish Return Communication with the FTP Server */
                ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                /* Resource Cleanup */
                ftpResponse.Close();
                ftpRequest = null;
            }
            catch (Exception ex) { Console.WriteLine(ex.ToString()); }
            return;
        }

        /* Rename File */
        public void rename(string currentFileNameAndPath, string newFileName)
        {
            try
            {
                /* Create an FTP Request */
                ftpRequest = (FtpWebRequest)WebRequest.Create(host + "/" + currentFileNameAndPath);
                /* Log in to the FTP Server with the User Name and Password Provided */
                ftpRequest.Credentials = new NetworkCredential(user, pass);
                /* When in doubt, use these options */
                ftpRequest.UseBinary = true;
                ftpRequest.UsePassive = true;
                ftpRequest.KeepAlive = true;
                /* Specify the Type of FTP Request */
                ftpRequest.Method = WebRequestMethods.Ftp.Rename;
                /* Rename the File */
                ftpRequest.RenameTo = newFileName;
                /* Establish Return Communication with the FTP Server */
                ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                /* Resource Cleanup */
                ftpResponse.Close();
                ftpRequest = null;
            }
            catch (Exception ex) { Console.WriteLine(ex.ToString()); }
            return;
        }

        /* Create a New Directory on the FTP Server */
        public void createDirectory(string newDirectory)
        {
            try
            {
                /* Create an FTP Request */
                ftpRequest = (FtpWebRequest)WebRequest.Create(host + "/" + newDirectory);
                /* Log in to the FTP Server with the User Name and Password Provided */
                ftpRequest.Credentials = new NetworkCredential(user, pass);
                /* When in doubt, use these options */
                ftpRequest.UseBinary = true;
                ftpRequest.UsePassive = true;
                ftpRequest.KeepAlive = true;
                /* Specify the Type of FTP Request */
                ftpRequest.Method = WebRequestMethods.Ftp.MakeDirectory;
                /* Establish Return Communication with the FTP Server */
                ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                /* Resource Cleanup */
                ftpResponse.Close();
                ftpRequest = null;
            }
            catch (Exception ex) { Console.WriteLine(ex.ToString()); }
            return;
        }

        /* Get the Date/Time a File was Created */
        public string getFileCreatedDateTime(string fileName)
        {
            try
            {
                /* Create an FTP Request */
                ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + fileName);
                /* Log in to the FTP Server with the User Name and Password Provided */
                ftpRequest.Credentials = new NetworkCredential(user, pass);
                /* When in doubt, use these options */
                ftpRequest.UseBinary = true;
                ftpRequest.UsePassive = true;
                ftpRequest.KeepAlive = true;
                /* Specify the Type of FTP Request */
                ftpRequest.Method = WebRequestMethods.Ftp.GetDateTimestamp;
                /* Establish Return Communication with the FTP Server */
                ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                /* Establish Return Communication with the FTP Server */
                ftpStream = ftpResponse.GetResponseStream();
                /* Get the FTP Server's Response Stream */
                StreamReader ftpReader = new StreamReader(ftpStream);
                /* Store the Raw Response */
                string fileInfo = null;
                /* Read the Full Response Stream */
                try { fileInfo = ftpReader.ReadToEnd(); }
                catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                /* Resource Cleanup */
                ftpReader.Close();
                ftpStream.Close();
                ftpResponse.Close();
                ftpRequest = null;
                /* Return File Created Date Time */
                return fileInfo;
            }
            catch (Exception ex) { Console.WriteLine(ex.ToString()); }
            /* Return an Empty string Array if an Exception Occurs */
            return "";
        }

        /* Get the Size of a File */
        public string getFileSize(string fileName)
        {
            try
            {
                /* Create an FTP Request */
                ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + fileName);
                /* Log in to the FTP Server with the User Name and Password Provided */
                ftpRequest.Credentials = new NetworkCredential(user, pass);
                /* When in doubt, use these options */
                ftpRequest.UseBinary = true;
                ftpRequest.UsePassive = true;
                ftpRequest.KeepAlive = true;
                /* Specify the Type of FTP Request */
                ftpRequest.Method = WebRequestMethods.Ftp.GetFileSize;
                /* Establish Return Communication with the FTP Server */
                ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                /* Establish Return Communication with the FTP Server */
                ftpStream = ftpResponse.GetResponseStream();
                /* Get the FTP Server's Response Stream */
                StreamReader ftpReader = new StreamReader(ftpStream);
                /* Store the Raw Response */
                string fileInfo = null;
                /* Read the Full Response Stream */
                try { while (ftpReader.Peek() != -1) { fileInfo = ftpReader.ReadToEnd(); } }
                catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                /* Resource Cleanup */
                ftpReader.Close();
                ftpStream.Close();
                ftpResponse.Close();
                ftpRequest = null;
                /* Return File Size */
                return fileInfo;
            }
            catch (Exception ex) { Console.WriteLine(ex.ToString()); }
            /* Return an Empty string Array if an Exception Occurs */
            return "";
        }

        /* List Directory Contents File/Folder Name Only */
        public string[] directoryListSimple(string directory)
        {
            try
            {
                /* Create an FTP Request */
                ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + directory);
                /* Log in to the FTP Server with the User Name and Password Provided */
                ftpRequest.Credentials = new NetworkCredential(user, pass);
                /* When in doubt, use these options */
                ftpRequest.UseBinary = true;
                ftpRequest.UsePassive = true;
                ftpRequest.KeepAlive = true;
                /* Specify the Type of FTP Request */
                ftpRequest.Method = WebRequestMethods.Ftp.ListDirectory;
                /* Establish Return Communication with the FTP Server */
                ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                /* Establish Return Communication with the FTP Server */
                ftpStream = ftpResponse.GetResponseStream();
                /* Get the FTP Server's Response Stream */
                StreamReader ftpReader = new StreamReader(ftpStream);
                /* Store the Raw Response */
                string directoryRaw = null;
                /* Read Each Line of the Response and Append a Pipe to Each Line for Easy Parsing */
                try { while (ftpReader.Peek() != -1) { directoryRaw += ftpReader.ReadLine() + "|"; } }
                catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                /* Resource Cleanup */
                ftpReader.Close();
                ftpStream.Close();
                ftpResponse.Close();
                ftpRequest = null;
                /* Return the Directory Listing as a string Array by Parsing 'directoryRaw' with the Delimiter you Append (I use | in This Example) */
                try { string[] directoryList = directoryRaw.Split("|".ToCharArray()); return directoryList; }
                catch (Exception ex) { Console.WriteLine(ex.ToString()); }
            }
            catch (Exception ex) { Console.WriteLine(ex.ToString()); }
            /* Return an Empty string Array if an Exception Occurs */
            return new string[] { "" };
        }

        /* List Directory Contents in Detail (Name, Size, Created, etc.) */
        public string[] directoryListDetailed(string directory)
        {
            try
            {
                /* Create an FTP Request */
                ftpRequest = (FtpWebRequest)FtpWebRequest.Create(host + "/" + directory);
                /* Log in to the FTP Server with the User Name and Password Provided */
                ftpRequest.Credentials = new NetworkCredential(user, pass);
                /* When in doubt, use these options */
                ftpRequest.UseBinary = true;
                ftpRequest.UsePassive = true;
                ftpRequest.KeepAlive = true;
                /* Specify the Type of FTP Request */
                ftpRequest.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
                /* Establish Return Communication with the FTP Server */
                ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
                /* Establish Return Communication with the FTP Server */
                ftpStream = ftpResponse.GetResponseStream();
                /* Get the FTP Server's Response Stream */
                StreamReader ftpReader = new StreamReader(ftpStream);
                /* Store the Raw Response */
                string directoryRaw = null;
                /* Read Each Line of the Response and Append a Pipe to Each Line for Easy Parsing */
                try { while (ftpReader.Peek() != -1) { directoryRaw += ftpReader.ReadLine() + "|"; } }
                catch (Exception ex) { Console.WriteLine(ex.ToString()); }
                /* Resource Cleanup */
                ftpReader.Close();
                ftpStream.Close();
                ftpResponse.Close();
                ftpRequest = null;
                /* Return the Directory Listing as a string Array by Parsing 'directoryRaw' with the Delimiter you Append (I use | in This Example) */
                try { string[] directoryList = directoryRaw.Split("|".ToCharArray()); return directoryList; }
                catch (Exception ex) { Console.WriteLine(ex.ToString()); }
            }
            catch (Exception ex) { Console.WriteLine(ex.ToString()); }
            /* Return an Empty string Array if an Exception Occurs */
            return new string[] { "" };
        }
    }
}
